package com.gjy.ds.recursion;

import org.junit.jupiter.api.Test;

/**
 * @author 宫静雨
 * @version 1.0
 * @since 2023-06-20 10:32:19
 */
public class MiGong {

    @Test
    public void test1() {

        int[][] map = new int[8][7];
        for (int i = 0; i < 7; i++) {
            map[0][i] = 1;
            map[7][i] = 1;
        }
        for (int i = 0; i < 8; i++) {
            map[i][0] = 1;
            map[i][6] = 1;
        }

        map[3][1] = 1;
        map[3][2] = 1;

        System.out.println("地图:");
        for (int[] ints : map) {
            for (int anInt : ints) {
                System.out.print(anInt + " ");
            }
            System.out.println();
        }

//        setWay(map, 1, 1);
        setWay2(map, 1, 1);

        System.out.println("新地图:");
        for (int[] ints : map) {
            for (int anInt : ints) {
                System.out.print(anInt + " ");
            }
            System.out.println();
        }
    }

    private static boolean setWay(int[][] map, int i, int j) {
        if (map[6][5] == 2) {
            return true;
        } else {
            if (map[i][j] == 0) {
                map[i][j] = 2;
                if (setWay(map, i + 1, j)) {
                    return true;
                } else if (setWay(map, i, j + 1)) {
                    return true;
                } else if (setWay(map, i - 1, j)) {
                    return true;
                } else if (setWay(map, i, j - 1)) {
                    return true;
                } else {
                    map[i][j] = 3;
                    return false;
                }
            } else {
                return false;
            }
        }
    }

    private static boolean setWay2(int[][] map, int i, int j) {
        if (map[6][5] == 2) {
            return true;
        } else {
            if (map[i][j] == 0) {
                map[i][j] = 2;
                if (setWay(map, i - 1, j)) {
                    return true;
                } else if (setWay(map, i, j + 1)) {
                    return true;
                } else if (setWay(map, i + 1, j)) {
                    return true;
                } else if (setWay(map, i, j - 1)) {
                    return true;
                } else {
                    map[i][j] = 3;
                    return false;
                }
            } else {
                return false;
            }
        }
    }


}
